Power Quality Analysis

Presentation On
Power Quality Analysis of Grid

Connected Solar Power Inverter
Group Members
14th Batch
1. M . Gayatri - 17H61A0229
2. T . Sai Teja – 17H61A0251
3. V . Shriya Priyanka – 17H61A0256
4. M . Akhil – 18H65A0210
Project guide
Mr.U.Chaitnaya sir.
Assistant professor.
Introduction
• Most electricity production by solar energy is separated into two forms.
First one is solar rooftop, which is a small electricity production and can
manage unused space on the rooftop for gaining benefits.
• This configuration generates less energy than grid system, but if there
are many solar rooftops in the area, it can generate much energy and
reduce electrical power consumption in transmission line.
• Another form is solar farm, which is a large electricity production and
generates huge energy.
• Since both forms send electrical power to transmission line, so it is required
to control electrical power quality and stability in power transmission
system.
• Regarding power quality, the significant factor is harmonics that are
generated by solar system, and then the generated power will be sent to
customers in the area.
• If the solar system has more harmonics, it would affect to electric/electronic
equipment, and power transmission system
Power quality:
• Power quality is commonly defined as the power grid’s

ability to supply a clean and stable power flow as a
constantly available power supply.
• The power flow should have a pure sinusoidal wave form

and it should remain within specified voltage and frequency
tolerances.
Power Quality Parameters:
• Parameters affecting power quality can be divided into two
categories, i.e. Steady-state (or continuous) and Disturbances.
• Steady-state power quality parameters include Harmonics

(waveform distortion), frequency deviation, voltage unbalance,
voltage fluctuations and flicker.
• Disturbances include outages, momentary interruptions,

momentary or transient overvoltage or surges, voltage dips and
voltage swell.
Experimentation
• For experiment, we used a PV Simulator to generate direct

current of solar energy. Then, an on-grid inverter transformed
direct current to alternating current for sending to grid
connected and/or electrical loads.
• There are 5 types of loads, which are herein incandescent,
ballast, incandescent and ballast, Light Emitting Diode (LED),
and motor.
• In this system, we connected solar energy from PV simulator to
on-grid inverter, grid system, and loads at the connecting point.
• The testing results were recorded using oscilloscope to keep current and
voltage waveforms of the system at the connecting point, and using Power
Quality Analyzer to keep electrical parameters and harmonics.
• Solar energy was sent to each load according to the load power.
• Incandescent of 500 W
• Ballast of 850 W
• Incandescent and Ballast of 1000 W
• LED lamp of 300 W
• Motor of 200 W
SIMULATION CIRCUIT
Result
CASE-1: CASE-2:
Advantages :
● Grid-connected solar electricity can be used locally
thus reducing transmission/distribution losses
● Power quality analysis can also be used for pre-function
testing to look closely at systems and their responses
and to simulate transients and other events.
● Power quality analytics also supports forensics, allowing
management to determine how a chain of events occurred
as it did, such as why a facility lost a particular breaker
that tripped the PDU (power distribution unit) and
resulted in a switchover to the UPS.
Conclusion
• The experimental results concluded that grid- connected inverter behaves as

load when PV does not generate solar energy because it receives power from
grid to verify the system connection.
• During PV does not generate solar energy, percentage of current harmonics
decrease because current flow in the system increases.
• This project analyzes and compares 2 states, when PV system not connected
and when PV system connected. By comparing these two results we can
analyze the harmonics produced by PV system
• Regarding the comparison study of current harmonics in the system
with various loads, it can be analyzed that grid harmonics are mostly
affected from harmonics of load and PV system but harmonics of load
has more affect than PV system.
• Resistive and inductive loads generate less current harmonics than
capacitive one and switching load, and harmonics of PV system do not
affect to load.
Thank You

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Presentation On

Power Quality Analysis of Grid

• Power quality is commonly defined as the power grid’s

• The power flow should have a pure sinusoidal wave form

• Steady-state power quality parameters include Harmonics

• Disturbances include outages, momentary interruptions,

• For experiment, we used a PV Simulator to generate direct

• The experimental results concluded that grid- connected inverter behaves as

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